The Snap&Read Extension now uses OrbitNote as it's PDF reader and annotator.
To launch OrbitNote from Snap&Read:
Login to Snap&Read.
Left click on the Snap&Read icon on the Chrome toolbar.
Left Click on PDF Reader.
OrbitNote help articles can be found at: https://support.texthelp.com/help/orbitnote
Whitelist items for OrbitNote can be found at: https://support.texthelp.com/help/urls-for-whitelisting-texthelp-products